Right click vue nodes (#5790)

This pull request refactors and improves the "More Options" popover
functionality for graph nodes in the UI. The main change is a rename and
redesign of the menu component from `MoreOptions` to `NodeOptions`,
introducing a global singleton pattern for popover control and enabling
context menu support on node right-click. This results in better
maintainability, more flexible triggering, and improved user experience.

**Node Options popover refactor and global control:**

* Renamed and refactored `MoreOptions.vue` to `NodeOptions.vue`,
removing the embedded button and exposing imperative methods (`toggle`,
`hide`, `isOpen`) for external control. The component now
registers/unregisters itself globally via `registerNodeOptionsInstance`.
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* Added `NodeOptionsButton.vue` as a dedicated button component for
triggering the popover, decoupling the button UI from the popover logic.
* Implemented a global singleton pattern in `useMoreOptionsMenu.ts` for
controlling the `NodeOptions` popover from anywhere, with
`toggleNodeOptions` and `registerNodeOptionsInstance` functions.
[[1]](diffhunk://#diff-ae87bdb1e06725eb19b8d0fc82ec40a5f8ca831a6632767cc5d214fc903b89b6R35-R65)
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**UI integration and event handling improvements:**

* Updated `SelectionToolbox.vue` to use the new `NodeOptionsButton`
instead of the previous embedded `MoreOptions` button, and added the
`NodeOptions` popover to the main `GraphCanvas.vue` template for global
accessibility.
[[1]](diffhunk://#diff-05d80ee1e28e634dc758394ddf1bfaa8e5ec72a186a6ea2e2b6f5dfba867b264L41-R41)
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* Added right-click context menu support to `LGraphNode.vue`, triggering
the node options popover at the cursor position and integrating with
node selection logic.
[[1]](diffhunk://#diff-a7744614cf842e54416047326db79ad81f7c7ab7bfb66ae2b46f5c73ac7d47f2R45)
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**Minor improvements and cleanup:**

* Updated references and variable names throughout the codebase to
reflect the new `NodeOptions` naming and logic.
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This refactor makes the node options menu more modular, easier to
maintain, and more flexible for future UI improvements.



https://github.com/user-attachments/assets/9c2f2556-4544-4e20-9f22-8f485b0ceadc

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5790-Right-click-vue-nodes-27a6d73d365081a98263c88d2e09e629)
by [Unito](https://www.unito.io)

src/composables/graph/useMoreOptionsMenu.ts

@@ -1,4 +1,4 @@
-import { computed, ref } from 'vue'
+import { type Ref, computed, ref } from 'vue'
 
 import type { LGraphGroup } from '@/lib/litegraph/src/litegraph'
 import { isLGraphGroup } from '@/utils/litegraphUtil'
@@ -32,6 +32,47 @@ export enum BadgeVariant {
   DEPRECATED = 'deprecated'
 }
 
+// Global singleton for NodeOptions component reference
+let nodeOptionsInstance: null | NodeOptionsInstance = null
+
+/**
+ * Toggle the node options popover
+ * @param event - The trigger event
+ * @param element - The target element (button) that triggered the popover
+ */
+export function toggleNodeOptions(
+  event: Event,
+  element: HTMLElement,
+  clickedFromToolbox: boolean = false
+) {
+  if (nodeOptionsInstance?.toggle) {
+    nodeOptionsInstance.toggle(event, element, clickedFromToolbox)
+  }
+}
+
+/**
+ * Hide the node options popover
+ */
+interface NodeOptionsInstance {
+  toggle: (
+    event: Event,
+    element: HTMLElement,
+    clickedFromToolbox: boolean
+  ) => void
+  hide: () => void
+  isOpen: Ref<boolean>
+}
+
+/**
+ * Register the NodeOptions component instance
+ * @param instance - The NodeOptions component instance
+ */
+export function registerNodeOptionsInstance(
+  instance: null | NodeOptionsInstance
+) {
+  nodeOptionsInstance = instance
+}
+
 /**
  * Composable for managing the More Options menu configuration
  * Refactored to use smaller, focused composables for better maintainability
@@ -181,6 +222,7 @@ export function useMoreOptionsMenu() {
     menuOptions,
     menuOptionsWithSubmenu,
     bump,
-    hasSubgraphs
+    hasSubgraphs,
+    registerNodeOptionsInstance
   }
 }